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Atopic diseases, allergic sensitization, and exposure to traffic-related air pollution in children

Verena Morgenstern1, Anne Zutavern, Josef Cyrys

  • 1Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Epidemiology, Ingolstaedter Landstrasse 1, D-85764 Neuherberg, Germany.

American Journal of Respiratory and Critical Care Medicine
|March 14, 2008
PubMed

Insights

Children living near busy roads have a higher risk of developing allergic diseases like asthma and eczema. Exposure to particulate matter (PM2.5) and nitrogen dioxide (NO2) is linked to increased atopic conditions.

Area of Science:

  • Environmental Health
  • Pediatric Allergy
  • Epidemiology

Background:

  • Previous studies suggest ambient air pollution increases atopic disease risk, but observational data are inconsistent.
  • Understanding the specific impact of traffic-related air pollutants on childhood allergies is crucial.

Purpose of the Study:

  • To investigate the association between exposure to traffic-related air pollutants and allergic disease outcomes in children.
  • To assess allergic sensitization and atopic diseases up to age 6 in a prospective birth cohort.

Main Methods:

  • Utilized a prospective birth cohort study with 2,860 children at age 4 and 3,061 at age 6.
  • Assessed long-term exposure to particulate matter (PM2.5), PM2.5 absorbance, and nitrogen dioxide (NO2) using GIS and air pollution measurements.
  • Employed distance to the nearest main road as a proxy for traffic-related air pollutant exposure.

Main Results:

  • Living closer to busy roads (<50m) showed strong positive associations with asthmatic bronchitis, hay fever, eczema, and sensitization.
  • PM2.5 absorbance was significantly linked to asthmatic bronchitis, hay fever, and pollen sensitization.
  • Nitrogen dioxide (NO2) exposure correlated with eczema, but not allergic sensitization.

Conclusions:

  • This study provides robust evidence linking ambient particulate matter exposure to increased risks of atopic diseases and allergic sensitization in children.
  • Traffic-related air pollutants, particularly particulate matter, are significant environmental risk factors for childhood allergies.
Abstract

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